One unit (approx.
72 fl oz (2 liters) of Essiac.5 oz/43 gm) of Essiac Powder makes approx. The main botanicals in Essiac tea are Burdock root (Arctium lappa), sheep sorrel leaves (Rumex Acetosella), slippery elm inner bark (Ulmus fulva) and Indian rhubarb root (Rheum officinale). Essiac Original Herbal Formula.